Open Source collaborative filtering frameworks

Question

I was wondering if there exists any open source frameworks that will help me include the following type of functionality to my website:

1) If I am viewing a particular p

Answer 1

There are also the Duine framework and OpenSlopeOne. But in my opinion, Mahout is still the best. You can find a survey about Open Source Recommender Systems here:

http://girlincomputerscience.blogspot.com.br/2012/11/open-source-recommendation-systems.html

Hope it helps!